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gnat-sockets-connection_state_machine-terminated_strings.ads
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-- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GNAT.Sockets.Connection_State_Machine. Luebeck --
-- Terminated_Strings Winter, 2012 --
-- Interface --
-- Last revision : 08:20 11 Jan 2015 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, or (at your option) any later version. This library --
-- is distributed in the hope that it will be useful, but WITHOUT --
-- ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have --
-- received a copy of the GNU General Public License along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
--____________________________________________________________________--
package GNAT.Sockets.Connection_State_Machine.Terminated_Strings is
--
-- String_Data_Item -- Terminated string
--
-- Size - Maximum string length
-- Terminator - String terminator, e.g. NUL
--
-- The actual value of the item is Item.Value (1..Item.Last)
--
type String_Data_Item
( Size : Positive;
Terminator : Character
) is new Data_Item with
record
Last : Natural := 0;
Value : String (1..Size);
end record;
--
-- Feed -- Implementation of the feed operation
--
procedure Feed
( Item : in out String_Data_Item;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
);
--
-- Get_Value -- Get current value
--
-- Item - The data item
--
-- Returns :
--
-- Current value of the data item
--
function Get_Value (Item : String_Data_Item) return String;
------------------------------------------------------------------------
--
-- Dynamic_String_Data_Item -- Terminated string
--
type String_Ptr is access String;
type Dynamic_String_Data_Item is new Data_Item with record
Last : Natural := 0;
Terminator : Character := Character'Val (0);
Value : String_Ptr;
end record;
--
-- Feed -- Implementation of the feed operation
--
procedure Feed
( Item : in out Dynamic_String_Data_Item;
Data : Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Client : in out State_Machine'Class;
State : in out Stream_Element_Offset
);
--
-- Finalize -- Overrides Data_Item...
--
procedure Finalize (Item : in out Dynamic_String_Data_Item);
--
-- Get_Maximum_Size -- The maximum string length without terminator
--
-- Item - The data item
--
-- Returns :
--
-- The maximum length of the string
--
function Get_Maximum_Size
( Item : Dynamic_String_Data_Item
) return Natural;
--
-- Get_Value -- Get current value
--
-- Item - The data item
--
-- Returns :
--
-- Current value of the data item
--
function Get_Value
( Item : Dynamic_String_Data_Item
) return String;
--
-- Set_Maximum_Size -- The maximum string length without terminator
--
-- Item - The data item
-- Size - The maximum length
--
-- This procedure expands internal buffer if necessary.
--
procedure Set_Maximum_Size
( Item : in out Dynamic_String_Data_Item;
Size : Positive
);
-----------------------------------------------------------------------
--
-- Get -- String from stream element array
--
-- Data - The stream element array
-- Pointer - The first element to read
-- Terminator - The string terminator
--
-- The parameter Pointer is advanced beyond the value obtained
--
-- Returns :
--
-- The result
--
-- Exceptions :
--
-- End_Error - Not enough data (no terminator)
-- Layout_Error - Pointer is outside bounds
--
function Get
( Data : Stream_Element_Array;
Pointer : access Stream_Element_Offset;
Terminator : Character
) return String;
--
-- Put -- String into stream element array
--
-- Data - The stream element array
-- Pointer - The first element to write
-- Value - The value to encode
-- Terminator - The string terminator
--
-- The parameter Pointer is advanced beyond the value output
--
-- Exceptions :
--
-- Data_Error - The string contains the terminator
-- End_Error - No room for output
-- Layout_Error - Pointer is outside bounds
--
procedure Put
( Data : in out Stream_Element_Array;
Pointer : in out Stream_Element_Offset;
Value : String;
Terminator : Character
);
private
pragma Assert (Stream_Element'Size = 8);
end GNAT.Sockets.Connection_State_Machine.Terminated_Strings;